2002

4.4

2002

6.1

1997

7.6

2001

6.2

2007

5.8

1995

6.5

2009

6.8

2004

5.7

2011

5.2

2006

6.3

2015

7.8

2014

5.8

2014

6.8

2002

5.4

2011

5.8

2010

7.7

2012

7.1

2005

7.2

2000

6.0

2008

6.8